About this cultivar:
Allium caesium provides gorgeous, pale sky-blue flower 'globes'. Each globe is comprised of dozens of florets accented with variable indigo-blue midveins, indigo-blue anthers and paler, almost white, centres. Its long-lasting flowers mature to a more lavender-gray colour in the garden (and the vase) after weeks of bloom. Adored by bees, butterflies and pollinators (they like alliums and they like blue...). A good idea is to plant in big groups for the best effect. This cool blue has the RHS AGM.
The Latin specific epithet caesium means 'grey-blue'. Native to central asian is if often found in deserts and in dry fields but will do fine in mositure soils as long as it is well drained.
- Position: Full sun, partial shade (prefers full sun)
- Soil: Almost any soil (as long as it is well drained), dry soil
Flowers: June, July, August
- Other features: Royal Horticultural Society Award of Garden Merit (RHS AGM), Bees and Butterflies, Suitable for Container
- Hardiness: H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10°C), Fully hardy
- Habit: Columnar or Upright
- Foliage: Deciduous
- Height: 30 - 60 cm (1 - 2 ft)
- Spread: 15 - 45 cm (0.5 - 1.5 ft)
- Time to full growth: 2 to 5 years
- Plant type: Herbaceous Perennial, Bulb
- Colour: Blue, green
- Goes well with: Osteospermum, Iris, Lavender, Artemisia, Sage, Phlomis and perhaps Rosa.
About this genus:Allium, also known as flowering onion, are disease resistant and very easy to grow in a wide range of conditions; from coastal areas to drought-prone areas to our own clay soil at Ballyrobert. They are bulbous, often edible, herbaceous perennials with a strong onion or garlic scent that is useful for warding off vampires.
Allium usually have pom-pom flowering heads that can be pink, yellow, lemon, powder-blue, purple, lilac, or white. They appear to flower for ever and insects love them. When Allium do stop flowering they don't droop-down - they dry-out! These dry flowers and stems add wonderful structure and offer an even longer 'flowering period'.
Great on their own they are also versatile plants. One use is weaving through other plants since they take up very little space on the ground and have an upright habit. We also grow a few of ours on a wall - it works! (we think). It is up to you what you do with yours! They are also great to grow in pots.
Some ideas: Try Allium next to pastels- we put the smaller ones next to Osteospermum. Or try them with Mediterranean plants like Lavender, Artemisia, Sage, Phlomis and perhaps Rosa. We also think their succulent appearance means they compliment Iris.